Cam-driven gear for reciprocating piston engines



' Jan. 6; 1931. c. WARYDY ET AL CAM DRIVEN GEAR FOR RECIPROCATING PISTON ENGINES Filed May 1s, 1929 2 Sheets-Sheet 1 2 2 Mum/mes Jain. 6,1931. WARD ET AL 1,788,259

CAM DRIVEN GEAR'FOR REGIPROCATING PISTON ENGINES Filed May 18, 1929 2 Sheets-Sheet .2

Patented Jan. 6, 1931 UNITED STATES PATENT OFFICE;

CHARLES WARD, OF STBETFORD, AND THOMAS GORDON HASSALL, OF STOCiKPORT, ENG- LAND; SAID WARD ASSIGNOR TO SAID HAS SALL CAM-DRIVEN GEAR FOR RECIPROCA'I'IN G PISTON ENGINES Application filed May 18, 1929, Serial No. 364,161, and in Great Britain November 19, 1928.

This invention relates to reciprocating piston engines having cam driving gear and whilst primarily directed to internal combustion engines is applicable for use with steam or other motive power, and has for its object to producea multi-cylindered engine of great simplicity and power relatively to its weight,

According to the present invention a plurality of cylinders are located on a pitch circle, preferably two sets being used in opposed relationship and with a rotary member journalled' between the same. Pistons are located in each cylinder, each piston being connected to a piston rod, one piston rod being used for each pair of opposed pistons.

The pistons are each provided with slippers or cross heads sliding in guides preferably,

formed in anall around casing constituting the distance piece for the two sets of cylinders.

Located in said casing is the rotary member j ournalled in suitable bearings carried thereby, and to which the driving shaft is connected. Said rotary member is formed with a peripheral cam groove or projection to 'engage projections or recesses on the slippers, said cam being shaped to allow for the reciprocation of the slippers one-or more times in both directions for each revolution thereof, the working strokes of each cylinder being timed to commence at the nearest apex of the cam and terminate at the end thereof at which point the working stroke of the opposed cylinder is timed to commence, any number of cylinders being used equally spaced around the rotor and timed so that the impulses transmitted to the rotary member are in correct relationship to the cam to produce the progressive rotary motion, which is transmitted to the member to be driven in any desired manner.

The invention will be more particularly described by the aid of the accompanying drawings in which Figure 1 is a sectional elevation of an engine constructed according to the invention,

Figure 2 is an end view. Figure 3 is a detail sectional view on the line 3-3 of-Fig. 1 showing more particularly N stroke principle, the forward end g of each one of the slippers and guides therefor.

Figure 4 is a side view, and

Figure 5 is a plan view of one of the supporting brackets for the engine casing.

In carrying the invention into efi'ect according to one convenient manner as illustrated, and as applied to an internal combustion engine, two end pieces a,-a are provided separated by a tubular distance piece I) having flanged ends to which said end pieces a are bolted. The latter are each provided with a'central boss, bored to receive the anti-friction bearings 0, 0 and anti-friction thrust bearings d to receive a shaft 6 formed in one with or rigidly connected to a cam rotor f located between said end pieces a, a. Equally spaced around a pitch circle.

of slightly larger diameter than therotor f, on each end piece a, are any desired number of cylinders g, a convenient number being with, or has secured there-n, at its mid portion a slipper i sliding in a grooved guide 6 formed in the tubular distance piece 6. Each slipper i is provided with a stubaxle i the axis of which, produced, forms a radii of the tubular distance piece, each axle '5 having an anti-friction roller 2' thereon to enter a cam groove is, formed in the periphery of the rotor f. Said groove is continuous and the contour of the cam is such as to allow of the full stroke of each piston inwardly and outwardly, prefera ly three times as shown, during each revolution of the rotor, but if desired it may be of acontour to allow bfonly a single inward and outwgrrx'ld stroke or such as to permit any desired 11 her. of inward and outward strokes of the pistons for each revolution.

Preferably the cylinders work on the two 30 or more points around the inlet manifold.

cylinder constituting a charging unit and engaging the cam groove, an exhaust manithe rear end 9 the explosion end, ports Z fold communicating with exhaust ports in connecting the two ends being controlled by the cylinders the inlet and exhaust ports in the piston in known manner, ports m leadeach cylinder being controlled by the reing from t e rear end 9 at each cylinder to spective piston, substantially as described. a common exhaust manifold n via the in- 2. In an internal combustion engine a clined pipes o. Said exhaust manifold contubular distance piece formed with guides veniently comprises a tubular ring formed to accommodate cross heads on piston rods, in two parts, each provided with flanges n two end pieces secured to the distance piece by means of which they are bolted, together and each formed with an all around inlet around the distance piece I), a layer of asbesmanifold communicating with the inlet ports tos n or other heat insulating material being or cylinders, cylinders bolted to the outside interposed as shown in Figure 1, thecarryof each end piece the cylinders on one end ing brackets 5 cast in one with said distance piece being in axial alignment with the cylinpiecebeing formed with openings 6 toacders on the other end piece, pistons in said commodate the same, see Figs. Land 5. The cylinders, piston rods connecting each pair inclination of the pipes 0 causes the exhaust of opposed pistons and formed with cross gases to enter the exhaust manifold 01 at an heads to enter the guides, anti-friction bear- ,angle so as to maintain a uniform flow of the ings in the end piece, a rotor formed with a combined exhaust gases tothe common outram groovelocated in the distance iece and let b. Anall around inlet manifold p is havinga shaft journalled in the anti-friction formed in each end piece a having a series of bearings, stub axles on the cross heads enoutlets communicating with the respective ing the cam groove, a common exhaust inlet ports 9 of each cylinder-leading to the a ifeld and conduits'leading from the exforward end "c of the same. A carburetor haust ports in the cylinder to the exhaust is attached at?) to each end piece, a passage manifold, said conduits being arranged at being formed therein leading to the inlet a an le to maintain, a uniform flow of the manifold, and if desired provision may be xha t gases t common tlet, b tanmade to admit the hydrocarbon fluid at two tially as d ib d, 7

3. In an internal combustion engine a Timing g not shown? is Provided y tubular distance piece formed with guides to means Of WhlCh the charge is exploded in accommodate cross heads on piston rods,

each cylinder as the anti-friction roller 2' on t d pieces b lt d t {h di t i e the respective slipper or cross head 2' rides d h f d with an all around inlet v 8 0V9! the edifice/ht ape/X of thg Cam k that manifold, cylinders bolted to the outside of as the slipper is reciprocated it reacts on the a h end piece, the cylinders on one end piece cam and produces a turning movement of the b i i i l li ment with the cylinders rotor, the cylinders being arranged and on the other end piece,pistons in said cylinftimed so that a y even is()Ique is Produced ders, piston rods connecting each pair of y these means y eflicient motors of opposed pistons and formed with cross heads I simple construction are produced which are t engage th id ,-i 1 t conduits leading comparatively light and have few working fr th common i l t if ld t th parts and which can be adapted for use with 1 id f th i t -t l ading from light heavy fuel Oils 01 $team for both below the inner to the outward end of the 45 statiohaly and movable g and in P cylinder and exhaust ports in said cylinders ticular for road vehicles, aeroplanes and submarines.

What we claim is x 1., In an' internal combustion engine a communicating by means ofinclinedconduits with a common exhaust manifold, antlfriction bearings in the and pieces to recelve the shaft of a rotor, a rotor formed with a '56 tubular distance PiaCe formed with guidesvto cam groove located in the distance piece and 55 of cylinders, cylindersbolted to the outside of h end 101866 the cyhhdels Oh one end Plece names to this specification at Manchester in' accommodate heads on Piston 'P having a shaft journalled in said anti-frictwo end pieces secured to the distance piece ti b i d t b xl on the cross and each formed with an all around inlet h d engaging th cam groove i th rotor, manifold communicating with the inlet ports Substantially d ib d In testimony whereof, we have signed our being in axial alignment h the y h' the county of Lancaster this 2nd day of May, ders on the other end piece, pistons in said 1929 7 cylinders, piston rods connecting each pair to of opposed pistons and formed with cross heads to enter the guides, anti-friction bearings in the end piece, a rotor formed with a cam groove located in the distance piece and having'a shaft journalled in the anti-fric- 66 tion bearings, stub axles on the cross heads CHARLES WARD. Y THOMAS GORDON HAS'SALL. 

